Modulation arrangement



Aug. 12, 1930.

. .M. OSNOS MODULATION ARRANGEMENT Filed Dec. 2, 1925 INVENTOR MENDEL osuos L W A ORNEY Patented Aug. 12, 1930 PATENT @FWQE MENDEL osNos, OF BERLIN, GERMANY, ASSIGNOR TO GESELLSCHAFT run DRAHTLOSE TELEGRAPHIE M. B. n, or BERLIN, GERMANY, A CORPORATION or GERMANY MODULATION ARRANGEMENT Application filed December 2, 1925, Serial No. 72,632, and in Germany December 4, 1924.

0r conductors which are common to both the controlling currents and the currents to be modulated, and in which, for the purpose of lowering the'controlling currents comparatively with the currents to be modulated, the

said windings or conductors are subdivided into a plurality of elements which are disposed in parallel for the modulated currents, and in series for the controlling currents. In order to compel the'modulator currents to flow by way of all of the elements in series, while shutting off their path by way of the joint connection of all of the said elements, blocking condensers are provided in this arrangement placed in the path of the modulated currents at both ends of each connection element ahead of their joint connection.

For a better understanding of the idea underlying the present invention an arrangement of this nature as illustrated in Fig. 7 of U. S. Patent application Serial No. 64,042. Patent No. 1,745,378, February 4, 1930, is here reproduced in Fig. 1 by way of example. Fig. 2 is a schematic diagram of the proposed improvement. Fig. 3 is a perspective view of the support for the conductor elements. Figs. 8 and 3 are top views of the supports, partly in section, showing modified forms of the condenser structures. Referring to Fig. 1, it will be noted that all of the elements a a for the controlling currents fed at terminals L L are connected in series. C stands for the blocking condensers above referred to.

It will be seen that there are a considerable number of elements a a which are necessary to reduce the controlling currents as far as possible. Also the number of blocking condensers G naturally will be correspondingly 'reat. c Now, according to the present invention, the arrangement can be simplified by connecting all of the poles of condensers C which are united to the oint terminal K to form a common condenser coat. A similar scheme may be followed with reference to the poles connected to terminal K The result is an arrangement of the sort shown in Fig. 2. In this diagram, terminal K is united with a joint coat C opposite which are component coats 0 each of which is brought to the respective end of the conductor elements a, a. Terminal K is similarly united with the joint condenser coat C opposite which are the component coats 0.

At each of the terminals K K there may be used only one of the usual type of condenser modified but slightly. In the case of condensers of the sort customarily used in practice, the two poles consist of a number of parallel sheets; one pole of such acondensor is united withoutfurther alteration to the common terminal K or K as the case may be, while the sheets of the other coats are divided into the corresponding number of separate groups or individual sheets, without other changes in their positionin the con denser, and thus connected with the respective ends of the choke conductors.

However, when extra high frequencies and low capacities are dealt with, but small coat surfaces of the blocking condensers is needed. The latter can be designed in such a manner that they are built into one body with the modulation choker.

1 An arrangement of this sort is illustrated by way of example in Figs. 8, 3 and 3 The conductors a a of the controlling device are here embedded Zig-zag fashion in the walls of a drum (Z (Fig. 3) conveniently built of concrete or the like, and the ends I) and 6, respectively, of the conductorsare soldered together at the upper end surface (Fig. 3 or the lower end surface (Fig. 3 of said drum with convenient segments 7' which serve as the condenser coats. Opposite the said segments 7, upon each side of the drum, there are plates C and C respectively, which constitute the other pole of the condenser, and upon plates 0 and C the terminals K, and K, are sup ported, as more particularly shown by Fig. 2.

Having thus described my invention, what I claim is 1. An article of manufacture comprising, a support, a conductor arranged in zig-zag fashion upon said support, a point for connecting a modulating current to the ends of nection between all of said capacity elements andsaid high frequency terminals, whereby said capacity elements associated with said conductor provide a series path for modulating current and parallel paths for high frequency current subject to the control of said modulating current.

2. An article of manufacture adapted for use in a modulation system comprising, a support, a conductor associated with and strung 0 back and forth longitudinally upon said support, said conductor being so disposed as to be series connected with respect to a controlling current and parallel connected with respect to a controlled current, and means associated with said conductor for preventing a flow of said controlling current in the path of the said controlled current which is external to the said series parallel conductor.

3. An article of manufacture for use in a g modulation system comprising, a support, a

conductor strung back and forth upon said support, a pair of terminals located upon said support for connecting a modulating current with said conductor, a second pair of terminals upon said support for connecting a high frequency current with said. conductor, means carried by said support and associated with said conductor carried thereby for separating the said current entering said termi- 4o nals and confining both of said currents to said conductor, and means provided by said back and forth stringing of said conductor and the positioning of said capacity elements for providing a series path with respect to said modulating current and a plurality of parallel paths with respect to said high frequency current,

4. An article of manufacture adapted for use in a modulation system comprising, a sup- 7 port, a conductor disposed back and forth in zig-zag fashion upon said support, said conductor being series connected with respect to a modulating current and parallel connected with respect to a controlled high frequency current, a plurality of small capacity units mounted upon each end of sard support, each of said capacity units being connected with said conductor at each point of reversal produced by said zigzag winding, a large capacity unit mounted upon each end of said support and extending over all of said small units, a dielectric substance separating each of said large and small capacity units, and a connecting point for high frequency current at each of said large capacity units, said capacities being adapted to prevent a flow of modulating current in the path of said high frequency current external to said capacities.

5. An article ofmanufacture for use in amodulation system comprising, a support mem her, a plurality of end plates for said support member, each of said end plates forming one part of a series of capacity elements, a conductor strung back and forth upon said support, a plate connected with said conductor at each point of reversal in the back and forth stringing on said support, each of said plates forming with said end plates a capacity element, a pair of terminals for supplying high frequency energy to said end plates and terminal points for simultaneously impressing modulating currents upon said conductor carried by said support.

6. In combination, an elongated cylindrical support surface, a conductor strung zig-zag fashion longitudinally of said support surface, a series of plates extending radially from the center of said support and insulated with respect to each other, each of said ra dially disposed plates being associated with said conductor and connected at each point of re versal in said zig-zag stringing of said conductor and serving as one part of a capacity ,unit, a cover plate upon each end of said support, said cover plate being separated from said radially disposed plates by a dielectric substance whereby said cover plate singly forms the second plate of said capacity units with said radially disposed plates, terminals for connecting high frequency currents with said terminal plates, terminals for connecting modulating currents with said Zig-zag disposed conductor, whereby modulating currents entering said conductor modulate the high frequency energy passing therethrough and are blocked from said high frequency path external to said conductor by means of said capacity elements.

MENDEL OSNOS. 

